Car-seat lock



(No Model.)

C. PARHAM.

GAR SEAT LOCK.

No. 429,176. Patented June 3, 1890.

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CHARLES PARI-IAM, OF PHILADELPHIA, PENNSYLVANIA.

CAR-SEAT` LOCK.

SPECIFICATION forming part of Letters Patent No. 429,176, dated June 3, 1890.

Application tiled February 20, 1890i Serial No. 341,141. (No model.)

To all whom it may con/cern:

Beit known that I, CHARLES PAEHAM, a citizen of the United States, residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented vcertain new and useful Improvements in Car Seat Locks, of which the following is a specification.

My invention relates to a class of devices employed to secure a reversible car seat-back in position on one or the other side of a car seat.

It is the object of my invention to provide a device of the foregoing character which while simple in construction and unlikely to get out of order, shall yet be certain and effi-v cient in operation.

In the drawings I illustrate, and herein I describe, a preferred form of a convenient embodiment of my invention, the particular subject matter claimed as novel being hereinafter definitely specified.

In the drawings, Figure l is an elevational View of a car seat, showing the seat arm, back, and back-arm. Fig. 2 is a vertical central longitudinal partly sectional elevation through the barrel and its contained devices, showing the bolt of the lock in engagement with abolt slot in the back arm. The parts in this view are in the position which they occupy when the key has been inserted in the lock and become engaged with the retractor,-but before said key has been rotated. Fig. 3 is a sectional plan of said barrel, showing the parts therein in the same position as in Fig. 2. Fig. e is a view similar to Fig. 3 and illustrating the same parts,-representing, however, the key and its reti-actor as having been given the quarter rotation necessary to retract the bolt as shown. Fig. 5 is aleft hand end elevational view of the barrel, supposed removed from its lock recess, the lip g at the end of the barrel being supposed removed. Fig. 6 is a right hand end elevational view of the lock, exhibiting the escutcheon, the bead, and the key block.

Similar letters of reference indicate corresponding parts.

In the drawings, A is the car seat; B the car seat arm; C the seat back; D the back arm, which is secured to the back, and pivotally secured to the seat arm B at the point 11,-and E are a pair of brackets, one of which is applied at or near each end of the arm 13,- and in one or the other of which brackets the arm D will rest in one or the other of the positions which the back C is capable of occupying.

Fis a lock recess extending through the seat arm B behind the bracket E, and f is a bolt recess which extends as a continuation of the lock recess, through the metal of the bracket E.

CZ (ZX are bolt slots which are formed in the metal of the back arm D and in such position therein that each is in the adjustment of the back adapted to be carried into registry with one of the bolt recesses in the respective brackets. The bolt slots,- as shown particularly in Fig. 2,-are conveniently formed in the back arm at the same distance from its pivot, are both as to their open ends which register with the bolt recesses, conveniently of the same diameter as said recesses, and both are as to one inner face or wall straight and as to the other inclined so that said slots are wedge shaped in cross section.

d is a guard rib, the same being a rib or bead projecting from that part of the face of the back arm D which is between the larger ends of the bolt slots d (ZX.

G is what I term the barrel of the lock, the same being a casing for its operative parts. The barrel is formed as a cylinder of such exterior diameter as to snugly fit within the 'lock recess and of such length as to extend through the seat arm. The end of the barrel which lies close to the bracket E is provided 'with an inturned lip g which partially closes it, leaving a central boltway gX of the same size as, and in registry with, the bolt recess in said bracket. Intermediately,and preferably about midway-of its length the barrel is provided with an internal circumferential rib g', the central boltway g2 through which is also of the same diameter as the bolt recess. The end of the barrel farthest from the bracket preferably protrudes slightly from the bolt recess, and is provided with an eX- ternal circumscribing iange g3 which rests upon and against the exterior face of the arm B, constituting an escutcheon,and is also provided with an internal circumferential roo bead g embodying a notch or recess gi",- which bead acts both as a ward and as a retaining device to retain in place the key block, whereof hereinafter'.

g f/ are two longitudinal slots formed in the wall ot the barrel between the lip g and the rib 5]' fora purpose hereinafter explained.

H is the bolt proper, being a bar of metal which is mounted for reciprocation in the boltways gX and g2 of the barrel and in the bolt recess f of the bracket. .The advance end of the bolt is as to one side straight and as to its opposite side beveled oit, as shown, to form a wedge like edge adapted to fit the bolt slot d which is presented before it.

7i is a cross bar passing through the substance of the bolt within the barrel, having its ends inserted in the longitudinal slots y gG hereinbefore referred to, and supporting or bracing a disk like spring plate 1'. The cross piece by its engagement with said slots g prevents the rotation of the bolt and limits the longitudinal movement ot the saine.

,l is a spiral spring surroumling` the bolt and bearing as to one end against the iixed rib g and as to its other end against said spring plate z', the expansive action of which tends to keep the bolt always out to the limit:

of its movement.

Referring to Fig. 2,-and assuming the bar D elevated ont of its bracket and in the act ot descending into the same, when the edge of said bar reaches the bolt it encounters its beveled edge and forces said bolt backward.

retracting its spring As soon, however, as the bolt slot (ZX presents bc fore the bolt, the latter shoots forward under the actuation of its spring into said bolt slot. The bolt slot (ZX is the slot which always presents bet'ore the lock under consideration, and when so presented the straight wall of the slot is lowermost and the straight portion of the end ot the boltopposes the lifting of the arm D. It will, of course, be understood that another lock is provided on the other end of the arm B, the bolt of which is adapted to operate in connection with the belt slot d. The rib d', as will be seen in Fig. 9, prevents the insertion between the arm D and bracket E and against the bolt of any implement, by means ot' which rib, any attempt to retract said bolt by press ure against its beveled edge would be defeated.

The retraction of the bolt by means of a key, to unlock the bar D, is et't'eeted by the following instrumentalities:

K is what l term the retractor, the same being a short cylinder contained within the barrel to the rear ot the rib g', and having abore of size sufficient to embrace and admit of the longitudinal movement within it of the rear end of the bolt.

7i: is a slet cut through the walls ot the retractor, and extending spirally along the saine in the manner shown in the drawings.

t'xis a stud mounted on the rear end of the bolt, and fitted within said slot. It will new be apparent that upon the rotation ot said retraetor l( in the direction of the arrow in lfig. 3, its slot will, working against the stud 7.a after the manner ot an inclined plane, force the stud and the connected bolt backward.

'lhe rear end ot' the wall of the retractorl( embodies an exterior recess t" forming a key seat fl upon the edge of said retraetor eylinder.

L is what I term the key block, it being a cylindrical bleek of metal7 fitted within the rear end of the barrel. The central portion of the length of the block is ot' such diameter as to snugly tit within and till said barrel. At its lower end said block is cutaway to l'orm a shoulderl which bears against the edge of the ret1aetor,and the remaining portion l et said lower end conveniently (its within the end of the bore et said retractor. The outer end of the block is similarly cut away to form a shoulder Z2 which bears against the head y while the remaining portion of said outer end, Z3, conveniently extends to andis llush with the outer surface ot' the escutcheon.

7,1 is a key slot formed in said key block, which slot extends through it from end to end and from its outeredge to its axial center.

M a plate or iiat key adapted to the key slot. Its advance end embodies a central recess in, and its sides embody recesses mx. lhe key block is free to and may be rotated without ai'teeting the lock. Said block therefore serves toprotect the operative parts of the lock from those desiring` to meddle with it. It also serves to guide the key to the seat lf2. When the belt is out as shown in Fig. 2, the key seat 7a2 is always in line with the recess gi in the bead, g". 'lo operate the lock the key block is rotated until its slot registers with the notch g5. The key is then inserted therein and said slot guides the key to the seat 71'?, and the key by means of its recess `nv, embraces said key seat while at the same time the key recess fnl/X is brought into position to permit its taking in in its rotation the bead g". Rotation imparted to the key will also be imparted to the retractor, with the eitect ot retracting the bolt, as already descrihed. The key is shown as provided with two of the recesses mone on each side, to permit of the operation ot the key, wit-hout regard to which of its sides is uppermost when it is inserted in the lock.

llaving thus described my invention, I claimM l. In a car seat lock, in combination with a barrel, a spring controlled bolt and a rotatable retractor, connected to each other by a sliding connection, and mounted in said barrel, substantially as set forth.

2. In a car seat lock, in combination with a barrel, a spring controlled bolt capable of longitudinal movement but held against rotation, and retractor capable of rotatory movement, said bolt and retractor being con- IIO nected to each other by a stud and slot connection, and being mounted in said barrel, substantially as set forth.

3. In combination, a spring-controlled bolt mounted for reciprocation in a car seat arm and retained against rotation, a stud mounted on said bolt, a rotatable retractor embracing the rear end of said bolt and embodying a spiral slot adapted to receive said stud, substantially as set forth.

4. In combination With a car seat arm, a back arm embodying` a bolt slot, a barrel, a spring-controlled bolt, mounted in said barrel and retained against rotation, a stud attached to said bolt, a rotatable retractor embodying` a bore Which receives the rear end of said bolt7 also embodying a spiral slot adapted to receive said stud, and also embodying a key seat, a retractor protecting device ,mounted at the end of said barrel and embodying a key slot, and a key, substantially as set forth.

5. In combination with ay barrel, a springcontrolled bolt mounted in said barrel held against rotating and provided With a stud,- a cylindrical retractor embracing the end of said bolt and embodying a spiral slot in which said stud engages, a key notch formed in the outer circumference of said retractor, and a key adapted to take into said key notch, substantially as set forth.

6. In combination with the barrel, a bead at the rear of said barrel which bead embodies a notch, a spring controlled bolt mounted in said barrel and retained against rotation and provided with a stud, a cylindrical retractor embracing the end of said bolt and provided with a spiral slot in Which said stud engages, a key notch formed in said retractor, a key block Within the barrel conned between the retractor and the bead, and embodying a key slot, substantially as set forth.

7. In combination with a car seat arm, a back arm embodying a bolt slot, a barrel, a bolt mounted in said barrel, a slot or Way in said barrel, a cross bar on said bolt mounted in said slot or Way, a rib or stop in the interior of said barrel, a spiral spring bearing against said cross bar and said rib or stop respectively, a stud mounted on said bolt, and a rotatable retractor embracing the rear end of said bolt and embodying a spiral slot adapted to receive said stud, substantially as set forth'.

8. In combination With a barrel provided With a notched bead, a spring-controlled bolt mounted in a car seat arm, a rotatable retractor embodying the key seat and also mounted in said car seat arm and connected with the bolt bya stud and slot connection, a key block, and a key embodying an end recess and a side recess, substantially as set forth.

9. In combination, the barrel provided with the lip, the rib, and the bead, the bolt provided with the cross piece and the stud, the spring, the retractor embodying the slot and the key seat, the key block embodying the key slot, and the key, substantially as set forth.

In testimony whereof I have hereunto signed my name this 17th day ot' February A. D. 1890.

CHARLES PARHAM.

In presence of- J. BoNsALL TAYLOR, F. NORMAN DIXON. 

